String format

CSS information

Standards information

Remarks

Some browsers do not recognize color names, but all browsers should recognize RGB color values and display them correctly.

An RGB color value normally consists of a "#" immediately followed by a triad of two-digit hexadecimal numbers specifying the intensity of the corresponding color: (R)ed, (G)reen, and (B)lue. For example, the color value "#FF0000" is rendered red because the red number is set to its highest value, "FF" (or "255", in decimal).

Each of the following style rules refer to the same color—namely, red. The three digit short-hand form is converted into the six digit form by replicating digits ("#F00" becomes "#FF0000"). The functional rgb() notation uses a comma-separated list of integer numbers from 0 to 255, or percentage values.